Here is what you should have done to add the option trees:
nM> option
Available Option Trees (<n> = index on path):
AUDIO = /home/burdell/nxm230/nxm/audio/
DATABASE = /home/burdell/nxm230/nxm/database/
<1> DSP = /home/burdell/nxm230/nxm/dsp/
<2> HWC = /home/burdell/nxm230/nxm/hwc/
NMPOST = /home/burdell/nxm230/nxm/nmpost/
SERVLET = /home/burdell/nxm230/nxm/servlet/
<3> SYS = /home/burdell/nxm230/nxm/sys/
UCL = /home/burdell/nxm230/nxm/ucl/
XBC = /home/burdell/nxm230/nxm/xbc/
nM> path add ucl
<Download the SAMPLEOPT option tree and expand it.>
<In this example it was put in /home/burdell/sampleopt123.>
nM> option sampleopt /home/burdell/sampleopt123/nxm/sampleopt
nM> path add sampleopt
nM> opt
Available Option Trees (<n> = index on path):
AUDIO = /home/burdell/nxm230/nxm/audio/
DATABASE = /home/burdell/nxm230/nxm/database/
<3> DSP = /home/burdell/nxm230/nxm/dsp/
<4> HWC = /home/burdell/nxm230/nxm/hwc/
NMPOST = /home/burdell/nxm230/nxm/nmpost/
<1> SAMPLEOPT = /home/burdell/sampleopt123/nxm/sampleopt/
SERVLET = /home/burdell/nxm230/nxm/servlet/
<5> SYS = /home/burdell/nxm230/nxm/sys/
<2> UCL = /home/burdell/nxm230/nxm/ucl/
XBC = /home/burdell/nxm230/nxm/xbc/